Across 5 covered model years from 1990 to 1997, the Harley-Davidson Fat Boy motorcycle has supplied wet/running weights ranging from 657 lb (298 kg) and dry weights ranging from 626.1 lb (284 kg), depending on model year.
Harley-Davidson Fat Boy weight overview
This sits in heavyweight territory. Riders should think about garage movement, backing up, surface slope and passenger/luggage load as much as the on-road feel.
Very Heavy Motorcycle
How heavy is the Harley-Davidson Fat Boy?
wet weight
Using a model-level wet weight comparison, the Harley-Davidson Fat Boy is heavier than about 87.5% of 12 Harley-Davidson sport-touring motorcycles with compatible weight data.
Dry vs ready-to-ride weight
Bike + rider total weight
These totals use the model’s representative wet weight. They exclude riding gear, luggage and a passenger.
Harley-Davidson Fat Boy weight & related specs
| Model years covered | 1990, 1991, 1992, 1996, 1997 |
|---|---|
| Wet / running weight | 657 lb (298 kg) |
| Dry weight | 626.1 lb (284 kg) |
| Engine displacement | 1,337 cc to 1,338 cc |
| Power | 49 hp to 67 hp |
| Torque | 71.5 lb-ft (97 Nm) |
| Fuel capacity | 4.23 US gal (16 L) |
| Full-tank fuel weight (estimated) | 26.3 lb (11.9 kg) |
Weight changes by model year
The 1990 model is used as the baseline where data is available. Only later supplied values that differ are shown below. A year pill does not mean every individual weight field was supplied for that year.
Useful weight calculations
| Horsepower per 100 lb | 7.46 hp / 100 lb to 10.2 hp / 100 lb |
|---|---|
| Pounds per horsepower | 9.81 lb / hp to 13.41 lb / hp |
| Torque per 100 lb | 10.89 lb-ft / 100 lb to 11.43 lb-ft / 100 lb |
| Displacement per pound | 2.04 cc / lb to 2.14 cc / lb |
| Weight per 100 cc | 46.8 lb / 100 cc to 49.1 lb / 100 cc |
| Fuel weight as % of bike weight | 4% |
What the weight numbers tell you
Harley-Davidson Fat Boy weight FAQ
What does the Harley-Davidson Fat Boy weigh ready to ride?
The supplied figures span 657 lb (298 kg) for wet/running weight and 626.1 lb (284 kg) for dry weight across the years in this page. Wet weight is the better guide to what you actually manage on the road.
Is the Harley-Davidson Fat Boy heavy compared with other Harley-Davidson sport-touring motorcycles?
Relatively speaking, it is on the heavier side. The model sits near the 88th weight percentile in its Harley-Davidson category, so it is heavier than most of the compatible comparison set.
Does the Harley-Davidson Fat Boy weight change by model year?
Not in the usable weight data on this page. Across the covered 1990, 1991, 1992, 1996, 1997 years, the supplied weight figure remains the same where comparable values are available.
How much does the Harley-Davidson Fat Boy fuel weigh?
The listed tank capacity is 4.23 US gal (16 L). Using approximately 0.745 kg/L gasoline, a full tank is roughly 26.3 lb (11.9 kg). That is an estimate for fuel mass, not an official Harley-Davidson curb-weight calculation.
How heavy is the Harley-Davidson Fat Boy with an average-size rider?
A 180 lb rider brings the simple bike-plus-rider total to roughly 837 lb (379.6 kg) using the representative wet/running figure. Gear and luggage would add more.
How much horsepower does the Harley-Davidson Fat Boy have per 100 lb?
Where compatible power and weight figures are available, it works out to 7.46 hp per 100 lb to 10.2 hp per 100 lb. That places it around the 81st percentile within the compatible Harley-Davidson sport touring power-to-weight comparison.
What is the Harley-Davidson Fat Boy torque-to-weight ratio?
The calculated torque-to-weight range is 10.89 lb-ft per 100 lb to 11.43 lb-ft per 100 lb. It is useful for comparing bikes with very different overall weights.
How large is the Harley-Davidson Fat Boy engine for its weight?
Engine displacement relative to bike weight is 2.04 cc per lb to 2.14 cc per lb. It can help compare motorcycles from very different displacement classes without relying on cc alone.
What are the lightest and heaviest Harley-Davidson Fat Boy years?
The usable year data ranges from 626.1 lb (284 kg) in 1996-1997 to 657 lb (298 kg) in 1990-1992.
Motorcycle specifications can vary by model year, market, equipment and the exact dry/curb-weight definition. Calculated fuel-weight and ratio figures on this page are estimates derived from the supplied specifications. Confirm critical figures in the owner’s manual or on the official Harley-Davidson website.